. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. Id TROPICAL AQUARIA and insulated from the influence of surrounding air by plenty of wool or cotton batting. It contains a large body of mercury over which the gas passes through a small space. As the water rises in temperature, the mercury expands and so reduces this passageway, and vice versa. It is a ver}' ingenious and effective device and may be obtained from makers of scientific glassware at small cost. Those selling them are glad to give complete instructions regardi
. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. Id TROPICAL AQUARIA and insulated from the influence of surrounding air by plenty of wool or cotton batting. It contains a large body of mercury over which the gas passes through a small space. As the water rises in temperature, the mercury expands and so reduces this passageway, and vice versa. It is a ver}' ingenious and effective device and may be obtained from makers of scientific glassware at small cost. Those selling them are glad to give complete instructions regarding regulation, etc. With this equipment in operation one never need worry about aquarium tem- perature as long as the wind cannot blow out the small pilot light. The thermostat is not in itself a heater, but merely controls the source of heat so as to keep a nearly uniform temperature. Electric light bulbs in the water are good heating units. Submarine sockets are made for immersing the whole light, or the ordinary socket may he used by immersing only about tv/o-thirds of the bulb. Shipping Tropical Fishes. It is bad policy taking the risk of shipping tropical fishes when the weather is not settled and warm. They ma}' keep warm during the train travel, only to receive a fatal chilling in delivery. To guard against this some shippers have designed special boxes equipped with an extra outside shell, the intervening space being filled with an insulating substance, ground cork being excellent for this purpose. A simple expedient consists of a tin can (with a tight lid) or glass jar set in a wooden box, then completely covered with ground cork, excelsior, papers or other substance, and the lid nailed down. The top of the box should be 1)oldly marked, stating contents. A handle on the top will help keep the top side up. The best method of transporting tropicals, where it does not interfere with interstate laws, is to get in touch with a Pullman porter and have him carry them through,
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Keywords: ., bookauthorinneswil, bookcentury1900, bookdecade1920, bookyear1921
